PDF malware analysis — malicious · 0ea32eb767302a11

MALICIOUS

PDF

83.6 KB Created: 2021-02-16 02:45:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: a0113d7d561517768342db45099bc052 SHA-1: 2fa5d679f4d9359cc96325195f386ce9dab34eb6 SHA-256: 0ea32eb767302a11bb0e14e46644f9ee95871fcd9874b043eb109465db2283bf

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'Qt', indicating its generation method, and the presence of embedded URLs further supports the attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://maypoin.ru/strik?utm_term=arduino+pdf+tutorial+point PDF link annotation
- http://proita.space/video_converter_to_mp4_apkpure9pdab.pdfIn PDF document text
- http://bufizuz.22web.org/59101214670.pdfIn PDF document text
- http://bizuzagewad.iblogger.org/94939067505.pdfIn PDF document text
- http://vatirigidofaxu.iblogger.org/gamoseferomomogulak.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4403418/normal_5fc7ff79b7871.pdfIn PDF document text
- https://cdn.sqhk.co/jotapepikota/aH5ihhR/universal_paperclips_speedrun.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4445868/normal_5fee1a0906641.pdfIn PDF document text
- http://ideaita.fun/bobcat_610_parts_manualo93wy.pdfIn PDF document text
- https://cdn.sqhk.co/pekuwalixeso/FhbExih/86751339826.pdfIn PDF document text
- https://cdn.sqhk.co/borefigux/bqhg90S/64624538612.pdfIn PDF document text
- https://cdn.sqhk.co/letaziseb/ifgcjgk/82049876102.pdfIn PDF document text
- http://fewomazojuxed.iblogger.org/21368865496.pdfIn PDF document text
- http://barcaporirternet-interbank-pe.com/zuravidaripetagawepibuganglvdp.pdfIn PDF document text
- http://tolufidefal.iblogger.org/zeranabufidete.pdfIn PDF document text
- https://jodotabamusunew.weebly.com/uploads/1/3/4/4/134402052/jenajobasir.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4454673/normal_600b2041ebe19.pdfIn PDF document text
- https://cdn.sqhk.co/rorajakura/QjbO6Dz/download_blondie_bride_perfect_wedding.pdfIn PDF document text
- https://cdn.sqhk.co/pegipoveridi/efp8Dhi/arena_pico_taptap_heroes.pdfIn PDF document text
- http://fly-drive.online/xapekaripapesiduebxkr.pdfIn PDF document text
- https://ziwuwozapa.weebly.com/uploads/1/3/4/5/134517717/dolira.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4451352/normal_5fe49689dd861.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fdf8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFDF8	4612 bytes
SHA-256: `261d3923cf875077efb92c5d3fb93daa742a3957dbc3d036d70fb4c3b171973c`
`font_01_sfnt_off00010d9e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D9E	10872 bytes
SHA-256: `7898d5c4eef69af41a35aa90780396df24418f7e75375d1b82d95c5b32167317`
`font_02_sfnt_off000132b2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x132B2	4324 bytes
SHA-256: `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`

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